Question

Read the following description of a data set. Last week, a political campaign aired a new TV ad promoting its candidate. The ad was aired a different number of times depending on the region. To decide how many times to air the ad next week, the campaign manager looked at the impact the ad had made in the different regions. He tracked the number of times the ad had run in each region, x, and the increase of the candidate's approval rating in those regions, y. The least squares regression line of this data set is: y=0.802x–3.422 Complete the following sentence: For each additional ad shown in a region, the least squares regression line predicts the candidate's approval rating would increase by points in that region.

Answer 1

For each additional ad shown in a region, the least squares regression line predicts the candidate's approval rating would increase by **0.802 points** in that region.